Dead bolt lock



E. OBRIEN DEAD BOLT LOCK March 14, 1961 3 Sheets-Sheet 1 Filed Dec. 22, 1959 INVENTOR. wan/z am/m March 14, 1961 E. OBRIEN DEAD BOLT LOCK 5 Sheets-Sheet 2 Filed Dec. 22, 1959 m5 H E M E f March 14, 1961 E. OBRIEN DEAD BOLT LOCK 3 Sheets-Sheet 3 Filed Dec. 22, 1959 A TTOzF/VFX DEAD BOLT LOCK Eugene OBrien, 5567 Wheeler St., Philadelphia 43, Pa.

Filed Dec. 22, 1959, Ser. No. 861,330

11 Claims. (C1,, 292-148) This invention relates to a dead bolt lock mechanism, the primary object of which is to employ as a component thereof a relatively small padlock in such a manner that the lock-becomes many times more rugged and secure than costlier dead bolt locks of greater size and complexity.

Another object of the invention is to provide a dead bolt lock mechanism in which a bolt is slidably mounted on a plate and the body of a relatively inexpensive conventional key-operated padlock is positioned thereon to act on the bolt mounting means and securely lock the bolt both in the fully extended and the fully retracted positions of the bolt.

Another object of the invention is to provide a dead bolt lock which is universal in the sense that it canextend into both right and left hand locking positions, can be installed in a corner and can be used on doors built to slide'vertically or horizontally and on swinging doors.

Yet another object of the invention is to provide a dead bolt lock which is easily manufactured, easily installed, easily changed to operate by a different key by simply switching padlocks, protected. from the elements and difficult to pick as installed and inexpensive as regards repair and replacement of parts.

These and other objects of the invention will become more apparent as the following description proceeds in conjunction with the accompanying drawing wherein:

Figure 1 is an exploded perspective view of the lock mechanism;

Figure 2 is a group view showing a plan of the stationary plate and a bottom plan of the slide bolt;

Figure 3 is an elevation of the assembled lock mechanism;

Figure 4 is a section taken on the line 4-4 of Figure 3;

Figure -5 is a section taken on the line 5-5 of Figure 4;

Figure 6 is a section taken on the line 6-6 of Figure 4;

Figure 7 is a section taken on the line 7-7 of Figure 6;

Figure 8 is a view similar to Figure 5 showing the bolt in the sliding or unlocked position;

Figure 9 is a view similar to Figure 4 but illustrating the use of the lock in a left hand position;

Figure 10 is a section similar to Figure 7 showing a modified form of shackle retainer;

Figure 11 is an elevational view similar to that of Figure 3 of a modified form of lock;

Figure 12 is a section taken on line 12-12 of Figure 11;

Figure 13 is a section similar to Figure 12 showing the bolt in a retracted position; and

Figure 14 is a section taken on line 14-14 of Figure 13.

Specific reference is now made to the drawings wherein similar reference characters are used for corresponding elements throughout.

Indicated at 10 is an elongated preferably rectangular plate adapted to be secured by screws 12 or the like to a support 14 such as a door. An elongated longitudinally extending slot .16 is provided in the plate 10 having ice rounded ends 18 and 20, the latter adjacent theend 2,2; of, the plate which is adjacent the free edge 24of; thesup, port or door 14. Intermediate itsends the slot 16. is en; larged as at 26 for a purpose soon to appear. spaced from the inner end 18 of the slot is an upstanding pin; 2 8' in the form preferably of a rivet'secured to theplate 10" having a reduced shank 30 extending above the, upper face of the plate 10 and an enlarged head 32 on the pin.

An elongated bolt 34 in the form preferablyof a rec-p tangular bar 36 is provided of thickness slightlyiless'than; the height of the shank 30 of the pin 28, Atapred eter-T- mined position the bar'36 is'provided with a longitudinal,

slot 38 like the slot 16 in the plate 1 0. The slot 38in;

eludes rounded ends 49' and 42 and an intermediate en,- larged portion 44 of diameter slightly larger thanjthat of head 32, the shank 30 of the pin 28 extending through;

said slot 38. Spaced from the end 42 of; the, Slot 38 is, a depending pin 46 in the form of a rivet secured to, bolt; bar 36 having a reduced shank 48- extending into slot 16 and an enlarged head 50 of diameter somewhat less than that of enlarged slot portion 26. The shank 48 of; theipin 46 approximates the width of slot 16 and the head 50 extends into an undercut portion 52- whose width is equal to,

the diameter of the enlarged portion 26, of the. slotas shown in dotted lines in Figures 2 and 5.

Thus when pin 28 of plate 18 is engaged in slot; 38. of bolt bar 36 and pin 46 of bolt bar 36 is engaged in slot.

16 of plate 10, the bolt bar 36 is slidably mounted on fixed plate 18. When bolt bar 36 is moved to the right.

as shown in Figures 3, 4 and 5, until shank 48; of pin. 46, is adjacent end 26 of slot 16 and shank 30 of-pin'28 is adjacent end 40 of slot 38, the right end, portion of the. bolt bar is extended beyond the free edge 24;, of the sup port or door 14 and is adapted to engage; in a suitable keeper 54 secured to another support 56 such as a jamb. or another door. When'the bolt bar 36 is moved into the opposite position, as shown in Figure. 9, it is. retracted until the shank 30 of pin 28 is adjacent or engages the. end

42 of slot 38 and the shank 48 of pin 46 is adjacent orengages the end 18 of the slot 16. This. latter position is the fully retracted position of the bolt bar when the. lock is used as a right hand lock and the fully extended position, as suggested in Figure 9, when the same is usedjas a left hand lock. At an intermediate position head; 50; en,- ters the enlarged portion 26 of slot 16 and head 32 enters the enlarged portion 44 of slot 38 whereupon the. .bolt bar 36 may be lifted off fixed plate 10.

A key-operated means is provided to releasably lock the bolt bar in the fully extended and fully retracted posi-. tions above described. This means comprises a conventional padlock 57 having a body 58 and a- U-shaped shackle 60 operativelyconnected. thereto. The shackle moves longitudinally relative to the longitudinal axis of the body and may be swiveled or hinged when open. The padlock extends transversely of the bolt bar 36, the web of the shackle being non-movably secured to the bar36 so that its legs extend centrally across the slot 38: whereby the padlock body 58 is movable relative to the shackle. Any number of means may be used to anchor and'center the shackle as will appear hereinafter.

To enclose the padlock, a hollow substantially rectangular housing 62 is provided which extends'transversely of bolt plate 36 and issecured thereto or is integral therewith, the internal dimensions of the housing being slightly in excess of the overall dimensions ofthe padlock when locked. The housing includes opposed longitudinally extending hollow ears 64 which terminate at the ends 40 and 42 of bolt bar slot 38, the width of the inner portions of said ears coinciding with the width of said slot 38. The front end of the housing is open as at 66 so that the portion 68 of the padlock body, 581

2,974,987. I Patented Map-.14 1,961,,

an open position shown clearly in Figures 1, 2 and 8 to a-locked position as shown clearly in Figures 3 and 5.

Several means may be used to anchor the shackle 60 so thatthe padlockbody 58 is retained in proper horizontal position to slide smoothly over bolt bar 36 into and out of locked position with respect to the shackle. One such means is shown in Figures 6 and 7 and comprises a member 72 at the rear of the housing 62 having an indented portion 74 therein. An upstanding yoke 76 is provided having an indented portion 78 in its rear face which opposes the indented portion 74 and with it forms a groove for receiving the bight or web of the shackle that extends around the yoke 76 thereby fixedly retaining the yoke in proper horizontal position. The yoke is secured to the bolt bar 36 by appropriate recessed screws 80 so that upon removal of the screws the entire padlock may be removed and replaced as desired. In Figure 10, the same member 72 having the indented portion 74 is used but instead of the yoke 76, an upstanding screw 82 is secured to the bolt bar, the screw bearing against the bight of the shackle 60 and extending almost to the inner upper face of the housing.

In use, when the padlock is unlocked by the key 70, the portion 68 of its body 58 extends outside the open end 66 of the housing 62 to the extent that the inner edge 84 of the padlock body (i.e., the edge from which the shackle 60 extends) is longitudinally clear of the head 32 of pin 28 which is carried by the fixed plate 10. In this condition, the bolt bar 36 is slidable on the fixed plate 10 in both directions. When the bolt is in its fully extended position and engaged in keeper 54, assuming for sake of description a right hand operation, the head 32 of pin 28 is in the left hand car 64 of the housing 62 withits shank 30 adjacent the end 40 of bolt bar slot'38 and the shank 48 of bolt bar pin 46 is adjacent the end 20 of plate slot 16 as shown clearly in Figure 4. When the key is removed and the padlock body pushed inwardly of the housing at this extended position of the bolt bar as shown by the arrow in Figure 5, the inner edge 84 of the padlock body traverses a longitudinal edge of the bolt bar slot 38 and remains as an obstruction to the head 32 as clearly shown in said Figure 5. Hence, the bolt is locked in this position as it cannot be retracted or moved to the left. When the key is inserted in the padlock and turned to open the same the padlock body springs to the open position of Figure 8 and the bolt may now be retracted to the fully retracted position wherein the head 32 of pin 28 is in the right hand ear 64 of the housing and the shank 30 thereof is adjacent the end 42 of the slot 38 while the shank 48 of pin 46 is adjacent the end 18 of the fixed plate slot 16. Again after the key is removed and the padlock body pushed inwardly its inner edge 84 traverses a longitudinal edge of slot 38 and obstructs the head 32 of pin 46 thereby locking the bolt in the retracted (or left hand extended) position. Note that the locking is accomplished by the obstruction of head 32 of pin 28 by the strongest part of the padlock, namely its body 58, rather than by its weakest member, the shackle 60.

The modification shown in Figures 11l4 is similar to that of Figures 1-10 except that it is a right hand lock only and not a universal right-hand, left-hand lock as previously described. It is the same in construction as the lock of Figures l-lO except that the slot 16 of fixed plate 10 and the slot 38 of slidable bolt bar 36 do not have central enlarged portions 26 and 44; and the slot 38 terminates at its end 40 adjacent the left hand edge of bolt bar 36 and therefore, the padlock body 58, its shackle 60 and the housing 62 with its cars 64 are positioned across said slot 38 adjacent the left hand edge of the bolt bar 36.

In addition, a screw 86 is threaded vertically through the right hand car 64 of the housing, the free end of which screw can extend, as shown in Figures 12-14, into the hollow'portion 88 of said right hand ear 64. When the free end of screw 86 extends into the hollow portion 88 it prevents separation of the bolt bar 36 from the fixed plate 10 but it does not prevent sliding of the bolt bar and locking of the same in the fully extended and fully retracted positions.

Thus, when the bolt extends into keeper 54 as shown in Figure 12, the head 32 is positioned in the hollow car 64- at the left of the housing and the shank 30 is adjacent the end 40 of bolt bar slot 38 while the shank 48 of pin 46 is adjacent the end 20 of fixed plate slot 16. When the key is removed and the padlock body 58 is pushed inwardly of housing 62 to a locked position, its inner edge 84 traverses a longitudinal edge of the bolt bar slot 38 thereby obstructing head 32 of pin 28 and locking the bolt in its extended position.

When the padlock is sprung open by the key, the edge 84 of padlock body 58 clears the head 32 of pin 28 allowing the same to ride freely in slot 38 whereby the bolt bar 36 may be retracted as shown in Figure 13. In this position the padlock body may still be urged inwardly of the housing until it locks atwhich point the inner edge 84 of the padlock body again obstructs the head 32 and thereby locks the bolt bar in its retracted position. However, the head 32 abuts the free end portion of the screw 86 which protrudes in its path thereby preventing the shank 30 of pin 28 from approaching the end 42 of slot 38. The end 42 of the slot 38 is enlarged to a diameter slightly exceeding that of the head 32. The end 18 of fixed plate slot 16 is also enlarged to a diameter slightly in excess of the diameter of the head 50 of the pin 46. Not only does screw 86 prevent the head 32 of pin 28 from aligning with the enlarged end 42 of slot 38 but it also prevents the head 50 of pin 46 from aligning with,

the enlarged end 18 of slot 16. Hence, separation of the bolt bar 36 from plate 10 is not possible unless the screw 86 is retracted so that its free end does not protrude into the path of the head 32 of pin 28.

While a preferred embodiment of the invention has here been shown and described, minor variations may be made by a skilled artisan without departing from the spirit of the invention and the scope of the appended claims.

I claim:

1. A dead bolt lock mechanism comprising an elongated plate adapted to be secured to a support, an elongated bolt, means interconnecting said bolt and plate whereby said bolt is slidable longitudinally on said plate from an extended position, in which an end portion of said bolt overhangs an end of said plate and is adapted to enter a keeper, to a retracted position in which said end portion of said bolt does not overhang said end of said plate, a key-operated padlock having a body and shackle, means fixedly retaining said shackle on said bolt in such a position that said body is movable transversely of said bolt whereby when said bolt is in a position of extension or retraction and said padlock is locked, said body acts on said bolt and plate interconnecting means to prevent movement of said bolt on said plate in said positions of extension or retraction.

2. A dead bolt lock mechanism comprising an elongated plate adapted to be secured to a support, an elongated bolt, means interconnecting said bolt and plate whereby said bolt is slidable longitudinally on said plate from an extended position, in which an end portion of said bolt overhangs an end of said plate and is adapted to enter a keeper, to a retracted position in which said end portion of said bolt does not overhang said end of said plate, a key-operated padlock having a body and shackle, means fixedly retaining said shackle on said bolt in such a position that said body is movable transversely of said bolt whereby when said bolt is in a position of extension or retraction and said padlock is locked, said body acts on said bolt and plate interconnecting means to prevent movement ofsaid bolt on. said plate in said to enter a keeper, to a retracted position in which said end portion of said bolt does not overhang said end of said plate, a key-operated padlock having a body and shackle, means retaining said shackle on said bolt in such a position that said body is movable transversely of said bolt whereby when said bolt is in a position of extension or retraction and said padlock is locked, said body acts on said bolt and plate interconnecting means to prevent movement of said bolt on said plate in said positions of extension or retraction, and a housing open at one end mounted on said bolt and extending transversely thereof, said housing receiving said padlock shackle and body withthe key receiving end of said padlock body being accessible through the open end of said housing.

4. A dead bolt lock mechanism comprising an elongated plate adapted to be secured to a support, an elongated bolt, means interconnecting said bolt and plate whereby said bolt is slidable longitudinally on said plate from an extended position, in which an end portion of said bolt overhangs an end of said plate and is adapted to enter a keeper, to a retracted position in which said end portion of said bolt does not overhang said end of said plate, a key-operated padlock having a body and shackle, means retaining said shackle on said bolt in such a position that said body is movable transversely of said bolt whereby when said bolt is in a position of extension or retraction and said padlock is locked, said body acts on said bolt and plate interconnecting means to prevent movement or" said bolt. on said plate in said positions of extension or retraction, said bolt and plate interconnecting means including a slot in said bolt extending longitudinally across said padlock shackle, and a pin on said plate extending into said slot, and a housing open at one end mounted on said bolt and extending transversely thereof, said housing receiving said padlock shackle and body with the key receiving end of said padlock body being accessible through the open end of said housing.

5. The combination of claim 4 wherein said bolt slot terminates adjacent the opposite transverse sides of said housing whereby when said plate pin is positioned at one or the other end of said bolt slot, said bolt is selectively in the extended and retracted positions of said bolt, and when said padlock is locked in a selected one of said positions, said padlock body traverses said plate pin thereby preventing relative movement between said bolt and plate.

6. A dead bolt lock mechanism comprising an elongated plate adapted to be secured to a support, an elongated bolt, means slidably mounting said bolt on said plate, said means including a longitudinal slot in said bolt and a pin upstanding from said plate and extending into saidslot, said pin having an enlarged head thereon above said bolt, said bolt being in the fully extended position for engagement in a keeper when said'pin is adjacent one end of said slot and in the fully retracted position when said pin is adjacent the other end of said slot, a key-operated padlock including a body and shackle carried thereby and movable longitudinally thereof from an open to a locked position, means fixedly retaining said shackle on said bolt in such position that said body and shackle extend transversely of said bolt with said shackle crossing said slot whereby when said pin is adjacent a selected end of said bolt slot and said padlock is locked, a portion of said padlock body traverses said head of said pin preventing further movement of said bolt relative to said plate.

7. The combination of claim 6 and a housing mounted on said bolt embracing said shackle and body, said hous ing being open at one of its longitudinally extending ends through which the key operated end of said body extends.

8. The combination of claim 7 wherein said means slidably mounting said bolt on said plate further includes a longitudinal slot in said plate to one side of said pin and a second pin depending from said bolt and extending into said plate slot, said second pin having an enlarged head at its lower free end extending beyond the longitudinal edges of said plate slot.

9. The combination of claim 8 wherein each of said longitudinal slots includes a central enlarged portion slightly exceeding the diameters of the heads of pins therein whereby when said heads align with said enlarged portions, said bolt and plate can be separated.

10. The combination of claim 8 wherein the end of said plate slot adjacent said plate pin is enlarged to a diameter slightly in excess of that of the head of said bolt pin and the end of said bolt slot adjacent said bolt pin is enlarged to a diameter slightly in excess of that of the head of said plate pin, and means carried by said bolt and movable into said enlarged end of said bolt slot to obstruct said plate pin head whereby said pin heads are disaligned with said enlarged ends of said slots preventing separation of said bolt from said plate until said obstructing means is retracted.

11. The combination of claim 6 where said means fixedly retaining said shackle is removable so that the entire padlock can be replaced.

References Cited in the file of this patent UNITED STATES PATENTS 199,832 Hyatt Jan. 29, 1878 1,368,711 Foley Feb. 15, 1921 FOREIGN PATENTS I a 853,639 France Dec. 7, 1939 

